Tips for several C # programming (i)

Programming | Tips One, minimizing windows

When you click on "X" or "alt+f4", minimize the window,
Such as:
protected override void WndProc (ref message M)
{
const int wm_syscommand = 0x0112;
const int sc_close = 0xf060;
if (m.msg = = Wm_syscommand && (int) M.wparam = = Sc_close)
{
User clicked Close button
This. WindowState = formwindowstate.minimized;
Return
}
Base. WndProc (ref m);
}

Ii. How to make the Foreach Loop run faster
foreach is a ready-made statement that simply enumerates and processes elements in a collection, as shown in the following example:
Using System;
Using System.Collections;
Namespace Looptest
{
Class Class1
{
static void Main (string[] args)
{
Create an ArrayList of strings
ArrayList array = new ArrayList ();
Array. ADD ("Marty");
Array. ADD ("Bill");
Array. ADD ("George");
Print the value of every item
foreach (string item in array)
{
Console.WriteLine (item);
}
}
}
You can use the foreach statement in each collection that implements the IEnumerable interface. If you want to learn more about foreach usage, you can view the C # Language specification in the. NET Framework SDK documentation.

At compile time, the C # Editor transforms each foreach region. IEnumerator enumerator = array. GetEnumerator ();
Try
{
string item;
while (enumerator. MoveNext ())
{
item = (string) Enumerator. Current;
Console.WriteLine (item);
}
}
Finally
{
IDisposable d = enumerator as IDisposable;
if (d!= null) D.dispose ();
}
This means that in the background, foreach management will give your program extra code to increase the overhead of the system.

Third, save the picture to an XML file
WinForm's resource file, the PictureBox image property, and so on, are converted to text saving, which is accomplished by serialization (serialization).
Example://
Using System.Runtime.Serialization.Formatters.Soap;
Stream stream = new FileStream ("E:\\image.xml", Filemode.create,fileaccess.write,fileshare.none);
SoapFormatter f = new SoapFormatter ();
Image img = image.fromfile ("E:\\image.bmp");
F.serialize (STREAM,IMG);
Stream. Close ();

Four, shielding Ctrl-v
The TextBox control in WinForm has no way to mask the ctrl-v clipboard paste action, if you need an input box, but you do not want the user to paste the contents of the Clipboard, you can use the RichTextBox control instead, and the CTRL-V key is masked in KeyDown, example:

private void Richtextbox1_keydown (object sender, System.Windows.Forms.KeyEventArgs e)
{
if (E.control && e.keycode==keys.v)
E.handled = true;
}